If you don’t know, the Paris Climate Accord was set in place to reduce worldwide greenhouse gas emissions — and now the USA is just one of only three countries in the entire world not to be a part of it. Syria and Nicaragua are the others.

A man was forcibly removed from a United Airlines flight on Sunday night (April 9) and celebrities are horrified by the video circulating of the incident.

Passengers had already boarded the flight when United staff told them they needed four volunteers to give up their seats for United employees who needed them.

When no one volunteered, United staff reportedly chose “volunteers” at random. A spokesman for United says that four people were chosen by the computer at random and three of them left the plane. When the fourth wouldn’t deplane, law enforcement was called.

Video from the flight shows the man being ripped out of his seat by officials while other passengers expressed their outrage. The man’s head allegedly hit the armrest and you can see blood dripping from his mouth while the cops drag him down the aisle of the plane by his arms.

The man who was forcibly removed from the plane identified himself as a doctor who needed to see patients on Monday.

“We followed the right procedures,” United spokesman Charlie Hobart told the Associated Press. “That plane had to depart. We wanted to get our customers to their destinations, and when one gentleman refused to get off the aircraft, we had to call the Chicago Police Department.”

“Flight 3411 from Chicago to Louisville was overbooked,” the company said in an official statement. “After our team looked for volunteers, one customer refused to leave the aircraft voluntarily and law enforcement was asked to come to the gate. We apologize for the overbook situation. Further details on the removed customer should be directed to authorities.”